Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffcda895f25acb4a…

MALICIOUS

PDF

43.5 KB Created: 2021-06-04 00:22:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: edaea4261f24f636b8f7b897ee09b799 SHA-1: c5ef893361bb1b24cb23cfaddceb6c4ef4966272 SHA-256: ffcda895f25acb4ac4da17a722a4d4f73944f0ee8f7543fbe1354b4312267d42
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.online/app/406889139/coin-master-hack-mobile-game-hack PDF link annotation
    • http://library.ft.upnvj.ac.id/repository/mcpe-master-hack-unlimited-coins_GM406889139.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/robux-win_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/roblox-builders-club-free_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/coin-master-how-to-get-free-pet-food_GM406889139.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/coin-master-free-spins-usa-2021_GM406889139.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/free-roblox-toy-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/coin-master-app-hacks_GM406889139.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/coin-master-golden-card-hack_GM406889139.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/is-minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/roblox-system_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/hack-coin-master-net_GM406889139.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/my-minecraft-account-was-hacked_GM479516143.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/mc-update_GM479516143.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/free-coins-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005069.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5069 24416 bytes
SHA-256: 64c47ddaf52fac5f927763d91b643ae7cecec9a1c7bd56a184916e86466dcc5d
font_01_sfnt_off00008872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8872 17948 bytes
SHA-256: d85bac05a6c530c5997aad474557790cc9f5c9ab79cb3a200cdd52cd9bbf1317

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